{ "name": "Exponential Moving Average", "description": "Exponential Moving Average indicator", "type": "ema", "display_type": "overlay", "timeframe": null, "default_parameters": { "period": 12 }, "parameter_schema": { "period": { "type": "int", "min": 1, "max": 200, "default": 12, "description": "Period for EMA calculation" }, "timeframe": { "type": "string", "default": null, "description": "Indicator timeframe (e.g., '1h', '4h'). Null for chart timeframe." } }, "default_styling": { "color": "#ff6b35", "line_width": 2 } }